Dental-blowpipe burner.



J. A. DE CARVALHO, JR.

DENTAL BLOWPIPE BURNER.

APPLICATION mu) MAY I6. 1916.

1 ,253 ,94% Patented an.] .5, 1918.

3 SHEET$-SHEET 1'.

WITNESSES A. DE CARVALHO, JR. DENTAL BLOWPIPE BURNER.

APPLICATION FlL-ED MAY16, 191s.

Patented Jan. 15, 1918.

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WITNESSES ,4 TTORNEYS 1. A. at CARVALHO, 1R. DENTAL BLOWPIPE-BURNER.APPLICATION FILED MAY 16. 1916.

1. 253 95 Y Patented Jan. 15, 1918-.

3 SHEETS-SHEET 3- WITNESSES v J Ja 6 main/010;? 1 W we Bey ma W Inrromivs JOSE ANTONIO m: CARVALHO, .13., or RIO DE JANEIRO, BRAZIL.

DENTAL-BLOWPIPE BURNER.

Specification of Letters Patent.

Patented Jan. 15, 1918.

Application filed May 16, 1916. Serial No. 97,866.

To all whom it may concern:

Be it known that I, J osii ANTONIO DE CAR- VALHO, J r., citizen ofBrazil, residing at Rio de J aneiro, Brazil, have invented new anduseful Improvements in Dental-Blowpipe Burners, of which the followingis a specification.

The object of this present invention is to provide an apparatus for theproduction in quantity and with sufficient pressure, of the gases fromalcohol; and for utilizing the heat produced by their combustion.

The principal characteristics of the apparatus is found in the fact thatit is able to carryout the works generally done by the employment ofcarbonic gas, gasolene or kerosene, employing alcohol of 36.

In the accompanying drawings- Figure 1 is a perspective view of anapparatus of the character mentioned, constructed and arranged inaccordance with the present invention;

Fig. 2 is a side elevation of said apparatus partly cut away to show theinterior construction of a portion thereof;

Fig. 3 is a detail View on an enlarged scale showing an inverted cupolato be used in connection with the apparatus herein described.

Fig. 4 shows a slightly modified form of gas chamber and blow-pipeattachment therefor;

Fig. 5 is a detail view in cross section of a distributer for gasifyingthe liquid under treatment.

Fig. 6 is a detail view in vertical section showing the delivery tubefor introducing the liquid to the generator.

The apparatus is provided with the necessary pieces for its working inthe ordinary cases. The reservoir for the alcohol, which is shownin thedrawing is represented as suspended. In order to supply the apparatuswith the air when necessary, it is pro vided with a small bellows.

In the drawings is provided a metal tube 12 having a valve 13, fromwhich extends a flexible tube 14, preferably of rubber strengthened by acoating of metal.

At the extremity of said flexible tube is screwed a metal coupling 15forming internally. a curved conduit 16, having a contracted orifice 17.

Screwed to the coupling 15 around the orifice 17 is a metal nut 18, towhich the tube 19 is joined, which terminates in a capillary orifice.

The tube 19 may be constructed in such a manner as to terminate in morethan one capillary orifice, and these may be arranged in such a manneras to give dilferent directions to the jets of liquid delivered by them.

Fixed by any adequate means to the tube 19 is the cup 20 to which aresecured the tubes 21, and the hollow cylindrical support 22. In thecircumference of the base of the support are the small orifices 23 andthe support is provided with a screw thread. All the above mentionedpieces should be constructed from an appropriate metal.

Supported by the tube 19 and partially covering the cup 20, is ametallic concavoconvex disk 24. In the lower part of the coupling 15,there is an orifice engaged by the screw 25, said orifice when openpermits of the introduction of a cleaning rod to the tube 19 and theorifice therein, so as to clean them in case of need.

Screwed to the support 22 is a hollow sphere or globe from which thetube 26 extends. This tube shown in the drawings as straight, may bebent. It may also be fixed or movable so that it may empty in thedirection the most convenient.

Indicated by the numeral 27 is a blowpipe supported on the tube 12 bymeans of a jointed upright 28. The blow-pipe 27 is attached to therubber tube 29, which is joined to the fixed metal tube 30, so that thedisplacement of the blow-pipe 27 will not cause by itself thedisplacement of the tube 30 which has a fixed position on the apparatus.The numeral 31 represents a bar 31 which, in solid union with theblowpipe 27, serves for giving this latter another fulcrum on theupright 28*.

The braces 32 are parallel to which are joined the parallel plates 33,in which the tubes 12 and 30 are securely fastened. This mounting servesthe triple purpose of pro tecting the blow-pipe against accidentaldisplacement. The braces 32 serve as a handle by which one may carry theapparatus when one desires.

The member indicated by 34 is a support provided with a slot into whichscrews 35 extend to engage a metal plate'34 curved to serve as a windshield for protecting the globe 35 and parts connected therewith.

The member 34 may be mounted upon or removed from the tube 12 by meansof the screw with butterfly nut 36.

The cupola shown in Fig. 3 can be fastened above the globe 35 and uponthe member 34 by-means of the screw 37.

A piece of asbestos cord lightly pressed should be placed in thecircular space formed by the cups 22 and 20, so as to fill up thatspace. I

In Fig. 3 cupola 38 has a chimney 39 and projections 40 in its interior,which support the cupola above the globe 35 and at a short distance fromthe latter.

Fig. 4 shows the globe 35 with the following modifications. The tube 41serves as an outlet for the gas, and is bent to open upward. The globe35 has in its upper part, a series of small holes 42 through whichescapes a part of the gas generated in globe 35.

The blow-pipe 27 in this view curves like a screw propeller around theglobe 35 and terminates in the interior of the tube 41.

A supplementary tube, varying as to dimensions, can be boxed in theextremity of the blow-pipe 27. The same thing may be done as regards thetube. i

The construction shown in Fig. 5 may be screwed upon the coupling 43shown in Fig. 6. Fig. 6 represents a metal coupling 43 in which is aconduit 44. The tube 14 joins onto'the nipple 45.

The alcohol runs through a flexible tube 46 which connects a reservoir47 with the apparatus at the end of the tube 12. The valve 13 beingopened, the alcohol runs at once through the conduit 16, orifice 17 andthe tube 19 from which it is delivered into the globe 35.

As soon as the asbestos cord around the support 22 appears in a humidstate in the inside of the little cup 20 one should ignite the alcoholwhich oozes therefrom.

The alcohol being ignited, the globe 35 becomes heated, and evaporatesthe alcohol delivered by the tube which spreads over the internalsurface of the said globe. The vapor thus generated is delivered by thetube 26 and the holes 42.

The vapor which escapes through the holes 42 if ignited produces theheat necessary to warm the globe 35 to a temperature suflicient for thecontinuation of the evaporation of the alcohol, which, in regulatedquantity proceeding from the tube 19, is sprinkled over its internalsurface. Any small portion of. alcohol which accidentally notevaporated, perchance escapes from the support 22 and will fall normallyinto the'tubes 21, where being ignited, it will be consumed.

Forcing a current of air into the blowpi e 27 and placing-it in aconvenient position in relation to the tube 26 from where the vaporescapes, we have the apparatus in a position proper for producing thenecessary heat for the carrying out of the work to which it is designed.

1. An apparatus of the character described, comprising a burner, areservoir, mounted upon the burner and provided with a discharge nozzle,means for delivering the material to be vaporized to the reservoirthrough the burner, and a blow-pipe having its nozzle at the dischargenozzle of the reservoir.

2. An apparatus of the character de scribed, comprising a burner, aglobe-shaped reservoir mounted on the burner and having a dischargenozzle, means for delivering the material to be vaporized to thereservoir through the burner, a blow-pipe, and means for adjustablyholding the blow-pipe with its nozzle adjacent the nozzle of thereservoir. 1

3. An apparatus of the character described, comprising a burner, aglobe-like reservoir mounted upon the burner and provided with openingsin its top and a discharge nozzle in its side, means for delivering thematerial to be vaporized to the reservoir through the burner, and ablow-pipe held adjacent the discharge nozzle of the reservoir.

4. In an apparatus of the character de scribed, a supply pipe, a supportmounted on the said pipe and provided with'a nozzle communicating withthe supply pipe, and'a nozzle discharges,said globe having a dischargenozzle.

5. In an apparatus of the character described, a supply pipe, a cup onthe said pipe, a second cup carried by the first cup and adapted tocontain an absorbent material, a nozzle projecting through the first cupand in communication with the supply pipe, and a globe mounted on thesecond cup and having a discharge nozzle.

6. In an apparatus of the character described, a supply pipe, a cupmounted on the said pipe and having right angular tubes, a second cupcarried by the first cup and having openings in its bottom, said secondcup being adapted to contain an absorbent material, a nozzle extendingthrough the first cup and communicating with the feed pipe, and a globemounted on the second cup and provided with a discharge nozzle.

7. In an apparatus of the character described, a feed pipe, a burner onthe feed pipe, an evaporating reservoir mounted upon the burner andhaving a discharge for the vapor, means for delivering the volatilematerial to the reservoir, a support carried by the feed pipe, andablow-pipe mounted in the support.

' globe held on the support and into which the 8. In an apparatus of thecharacter described, a feed pipe, a burner on the feed pipe, anevaporating reservoir on the burner and having a discharge for thevapor, means for delivering the volatile material to the reservoir, asupport mounted on the feed pipe, a blow pipe and means for mounting theblow-pipe in the said support.

9. In an apparatus of the character described, a feed pipe, a burner onthe feed pipe, an evaporating reservoir on the burner and having adischarge for the vapor, means for delivering the volatile material tothe reservoir, a support mounted on the feed pipe and provided withhandles, and a blowpipe mounted in the support.

10. In an apparatus of the character de-' scribed, a burner, a globemounted on the burner, means for admitting the material to be evaporatedto the globe, and a 011 01a adapted to rest upon the globe in spacerelation thereto.

11. In an apparatus of the character described, a feed pipe, a burner onthe feed pipe, an evaporating reservoir on the burner, and having adischarge for the vapor, means for admitting the material to beevaporated to the reservoir, and a support adjustably and removablysecured to the feed pipe adjacent the reservoir, said support beingadapted to carry a Wind screen. In testimony whereof I have slgned myname to this specification in the presence of two subscribing Witnesses.

Jest ANTONIO DE GARVALHO JUNIOR. Witnesses:

SYLo TAVARES DE LUEIROZ, Jo. DE SAUZA Rnrs.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, I). 0.

